DTC Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check for stop lamp illumination under the following conditions.

   Condition		Stop lamp
   Brake pedal	Fully released	Not illuminated
   	Slightly depressed	Illuminated

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 2.

1. Disconnect stop lamp switch harness connector.
2. Check the voltage between stop lamp switch harness connector and ground.

   Stop lamp switch		Ground	Voltage
   Connector	Terminal
   E38	1	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 3.

Check the following.

• 10 A fuse (No. 21)
• Harness for open or short between stop lamp switch and battery
• Loose or poor connection for each connector and harness

Repair open circuit, short to ground or short to power in harness or connectors.

1. Disconnect stop lamp switch harness connector.
2. Disconnect ECM harness connector.
3. Check the continuity between stop lamp switch harness connector and ECM harness connector.

   Stop lamp switch		ECM		Continuity
   Connector	Terminal	Connector	Terminal
   E38	2	E77	139	Existed

4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

GO TO 6.

NO

GO TO 5.

Check the following.

• Harness for open or short between ECM and stop lamp switch
• Loose or poor connection for each connector and harness

Repair open circuit, short to ground or short to power in harness or connectors.

Refer to Component Inspection (Stop Lamp Switch) .

Is the inspection result normal?

YES

INSPECTION END

NO

Replace stop lamp switch. Refer to Removal and Installation .